preinst is in postgresql-common 134wheezy4.
This file is a maintainer script. It is executed when installing (*inst) or removing (*rm) the package.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 | #!/bin/sh
set -e
# remove a no-longer used conffile
rm_conffile()
{
PKGNAME="$1"
CONFFILE="$2"
if [ -e "$CONFFILE" ]; then
md5sum="`md5sum \"$CONFFILE\" | sed -e \"s/ .*//\"`"
old_md5sum="`dpkg-query -W -f='${Conffiles}' $PKGNAME | sed -n -e \"\\\\' $CONFFILE'{s/ obsolete$//;s/.* //p}\"`"
if [ "$md5sum" != "$old_md5sum" ]; then
echo "Obsolete conffile $CONFFILE has been modified by you."
echo "Saving as $CONFFILE.dpkg-bak ..."
mv -f "$CONFFILE" "$CONFFILE".dpkg-bak
else
echo "Removing obsolete conffile $CONFFILE ..."
rm -f "$CONFFILE"
fi
fi
}
case "$1" in
install|upgrade)
# Upgrade from previous versions
if dpkg --compare-versions "$2" lt-nl "96"; then
rm_conffile postgresql-common /etc/postgresql-common/autovacuum.conf
rm_conffile postgresql-common /etc/cron.d/postgresql-common
fi
if dpkg --compare-versions "$2" lt-nl "111~"; then
# versions 109 and 110 installed common init script with wrong
# priority
for l in 2 3 4 5; do
if [ -L /etc/rc${l}.d/S20postgresql -a ! -L /etc/rc${l}.d/S19postgresql ]; then
echo "Fixing init script priority of /etc/rc${l}.d/S20postgresql to S19..." >&2
mv /etc/rc${l}.d/S20postgresql /etc/rc${l}.d/S19postgresql
fi
done
for l in 0 1 6; do
if [ -L /etc/rc${l}.d/K20postgresql -a ! -L /etc/rc${l}.d/K21postgresql ]; then
echo "Fixing init script priority of /etc/rc${l}.d/K20postgresql to K21..." >&2
mv /etc/rc${l}.d/K20postgresql /etc/rc${l}.d/K21postgresql
fi
done
fi
# Remove obsolete init script from postgresql-8.3. It provides
# "postgresql" which is also provided by our common init script, and
# insserv chokes on this. Note that there is no reason to stop/restart
# postgresql-8.3, the new init script will just take over.
if dpkg --compare-versions "$2" lt-nl "112~"; then
rm_conffile postgresql-8.3 /etc/init.d/postgresql-8.3
fi
dpkg-divert --package postgresql-common --rename --divert /usr/bin/pg_config.libpq-dev --add /usr/bin/pg_config
;;
abort-upgrade)
;;
*)
echo "$0 called with unknown argument \`$1'" 1>&2
exit 1
;;
esac
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